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SACE Tmax T

A complete range of moulded case circuit-breakers up to 3200 A.

All the circuit-breakers, both three-pole and four-pole, are available in the fixed version; sizes T4 and T5 in the plug-in version and T4, T5, T6, and T7 also in the withdrawable one.

High breaking capacity in compact dimensionsHigh values of short circuit breaking capacity are guaranteed at different voltage levels, without compromising overall dimensions.

Flexibility of useThermomagnetic and electronic trip units are available for use in AC/DC or in AC only. It is possible to interchange trip units keeping the same breaking part, so that installation can be upgraded with fewer costs.

Advanced protectionA complete range of electronic trip units is suitable for different level of protection, even enhancing selectivity values with Early Fault Detection and Prevention algorithm.

Energy metering

During the last years, the growing attention to the environmental issues together with new policies of cost reduction, which involve not only capital costs but also operational costs, has led to a wider diffusion of the energy measurements practice down to the lower distribution levels.

Aim of this tendency is to get to an optimal load management and to identify possible system inefficiencies. Examples of these loads can be machinery, any subparts of an industrial plant, the various modules that compose a data center as well as the different consumptions of a conditioning system in a mall. The possibility to measure, transmit and store data about each load is fundamental.

PR223DS is the solution for energy metering for Tmax T4, T5 and T6 in conjunction with voltage module VM210. Tmax T7 and T8 with PR332/P trip units and PR330/V are the answer for the same application for currents up to 1600A and 3200A. Mentioned trip units have an option to be integrated in a communication network.

Motor protection

Motor protection is one of the most common application for moulded case circuit breakers in low voltage installations.

Safety and reliability of solution are important aspects that must be considered when choosing and manufacturing a system for starting and monitoring motors. Start-up is a particularly critical phase for the motor itself and for the installation powering it.

When it comes to direct starting, ABB SACE proposes two different solutions:

a conventional system with three poles circuit breaker equipped with a magnetic only trip unit for protection against short-circuits, a thermal relay for protection against overloads and phase failure or imbalance, and a contactor to operate the motor;

an advanced protection system onboard the circuit breaker which integrates all the protection and monitoring functions, and a contactor for operating the motor

PR221DS-I and PR231P-I trip units can be coordinated with contactors and thermal relays for the most common solutions.

Ekip M-LRIU, available on T5 and T6 are the most advanced options to integrate protection functions onboard the circuit breakers. Protection against overload (with thermal memory) is guaranteed by selecting a trip class among 3E, 5E, 10E, 20E in accordance with IEC 60947-4-1. Protection U against phase unbalance, R against rotor lock, and G against ground faults can also be available.

Early Fault Detection and Prevention

Selectivity between protection devices in a low voltage installation is required in order to detect rapidly a fault and to isolate the fault zone so that all unaffected circuits can have service continuity.

Use of PR223EF electronic release is a way of realizing zone selectivity between Tmax T4L, T5L and T6L moulded case circuit breakers. PR223EF implements the EFDP technology (Early Fault Detection and Prevention), capable of detecting short-circuit by “predicting” the fault, based on analysis of the trend of the current derivative in relation to the time.

One of the main advantages in implementing EFDP technology and zone selectivity is the reduction in size of circuit breakers. By means of PR223EF releases, it is possible to obtain 100kA of selectivity even between two circuit breakers of the same size, so with no need to overdimension upstream device.

ABB SACE Quality System obtained first certification with RINA certification body in 1990.

Attention to protection of the environment is a priority for ABB SACE. Confirmation of this is an Environmental Management System certified by RINA in conformity with the International ISO14001 Standard. In 1999 the Environmental Management System was integrated with the Occupational Health and Safety Management System according to the OHSAS 18001 Standard and later, in 2005, with the SA 8000 (Social Accountability 8000) Standard, committing itself to respect of business ethics and working conditions.

ISO 14001, 18001 and SA8000 recognitions together with ISO 9001 made it possible to obtain RINA Best Four Certification.